> ## Documentation Index > Fetch the complete documentation index at: https://docs.allium.so/llms.txt > Use this file to discover all available pages before exploring further. # Blocks Blocks are the building blocks of blockchains and rollups. A block contains transactions which will alter the state of an EVM system incrementally. Transaction within a block can only be executed one after the other, not in parallel. Several columns may only be applicable for specific EVM-compatible blockchains. The list of columns present in the table is not exhaustive. ### Table Columns Unique Key: `number` | Column Name | Data Type | Description | | -------------------------------- | ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | | timestamp | TIMESTAMP\_NTZ(9) | The unix timestamp for when the block was collated. | | number | BIGINT | The length of the chain, in blocks. | | hash | VARCHAR | Unique identifier of a block. | | parent\_hash | VARCHAR | Unique identifier of the block preceding this block, also known as the parent block. | | nonce | VARCHAR | The hash of the generated proof-of-work. null if pending. | | sha3\_uncles | VARCHAR | An array of uncle hashes. | | logs\_bloom | VARCHAR | The bloom filter for the logs of the block. | | transactions\_root | VARCHAR | The root of the transaction trie of the block. | | state\_root | VARCHAR | The root of the final state trie of the block. | | receipts\_root | VARCHAR | The root of the receipts trie of the block. | | miner | VARCHAR | The address of the beneficiary to whom the mining rewards were given. | | difficulty | BIGINT | The integer of the difficulty for this block. | | total\_difficulty | VARCHAR | The integer of the total difficulty of the chain until this block. | | size | BIGINT | The size of the block, in bytes, as determined by the gas\_limit. | | extra\_data | VARCHAR | The "extra data" field of this block. | | gas\_limit | BIGINT | Gas limit of the current block. | | gas\_used | BIGINT | Total gas used in the block. | | transaction\_count | BIGINT | Number of transactions included in this block. | | base\_fee\_per\_gas | BIGINT | Post London Upgrade (EIP1559), this represents the minimum gas\_used required for a transaction to be included in a block. Represented in wei. | | send\_root | VARCHAR | The root hash of send operations. | | blob\_gas\_used | BIGINT | Total blob gas used by all blob transactions in the block. Introduced in EIP-4844 (Dencun upgrade) for proto-danksharding. | | excess\_blob\_gas | BIGINT | The excess blob gas from the previous block, used to calculate blob gas price. | | parent\_beacon\_block\_root | VARCHAR | The root of the parent beacon block, linking execution layer blocks to consensus layer blocks. | | withdrawals\_root | VARCHAR | Root hash of the withdrawals list in the block; part of the block header introduced in Ethereum post-merge for validator withdrawals. | | withdrawals | VARIANT | List of validator withdrawals (from the beacon chain) included in the block | | requests\_hash | VARCHAR | Hash of execution requests included in the block. Used by some EVM-compatible chains for cross-chain communication and execution requests. | | l1\_block\_number | BIGINT | The L1 block associated with the given block. For example, for L2s, this may be the Ethereum L1 block where the L2 batch was posted. | | send\_count | BIGINT | The number of send operations | | shared\_gas\_limit | BIGINT | The shared gas limit across all transaction types in the block, used by chains with multiple gas limit configurations. | | main\_block\_general\_gas\_limit | BIGINT | The gas limit for general transactions in the main block, separate from specialized transaction types. | | timestamp\_millis | BIGINT | The block timestamp in milliseconds since Unix epoch, providing higher precision than the standard second-level timestamp. | | timestamp\_millis\_part | BIGINT | The millisecond component of the block timestamp, representing the fractional part when timestamp is in seconds. | | \_extra\_fields | VARIANT | Any additional fields that aren't explicitly defined | | \_created\_at | TIMESTAMP\_NTZ(9) | Timestamp when the record was created. | | \_updated\_at | TIMESTAMP\_NTZ(9) | Timestamp when the record was last updated. |